Brake



E; E. BOENING.

BRAKE.

APPLlcATloN'FlLED APR.9,1920.

1,402,042, Patented Jan. 3, 1922,

e' 57 @Hoff/@121% 3 WM Y. ortie-1:.

ERNEST E.'BOEN1'NG, 0F YONKERS, NEW YORK.

BRAKE.

Lacaoaa. l

vSpecification of Letters Patent.

Patented Jan. 3, ,1922,

i Application led AprlcS, 1920.- Serial No. 372,463.

To aZZ .wtom it may concern:

Be it known that I, ERNEST E. BonNiNe, a citizen of the United States, and a resident of Yonkers, Westchester County, and State of New York, have invented certain new and useful Improvements in'Brakes, of which the following is a specification.

My present invention relates to improvements in brake mechanism, particularly for motor vehicles and other paratus. i y ,y

rlhe objects of the invention are to provide simple and .ecient brake mechanism which will consist of but few and relatively inexpensive parts readily assembled, whichV will operate without dragging which will not require' special brake linings and which with slight effort can be caused'to' eXertfa maximum' braking force.,VA

The invention'Y involves features vof construction, lcombinations and arrangements of parts, as' will 'be disclosed in the following specification.

ing a part of this specication l have illustrated the invention embodied indifferent practical forms, but wish it understood that the structure may be further modified without departure from the true 'spirit and scope` of the invention as denedr in the appended claims.

ln the drawing referred to, `Figure 1 isan elevation partly in section, illustrating a simple form of the 'braking-'mechanism- Figures 2 and 3 are elevations, partly in sections, on substantially theppl'anes of lines 2 2 and 8-3 of Figure 1.

Figurell is a view illustrating an embodiment `of the brake as 'applied to a motor vehicle. f

Figure 5 isa sectional elevation of' the same as taken on substantially the plane of line 5-5 of Figure 4.y Y

In the simple form of thev invention iirst illustrated, 10 designates the element to be cont-rolled which, in this instance, is a shaft.

A Fixed on thisl shaft are the two brake drums 11 and 12 provided each with edge anges 13 and 14, the latter of which is indicated as removably held in place by means of securing bolts 15.

16 and 17 designate brake' rings which power driven apconsist in-each instance of circular and practicallyfrigid. ring element surrounding the brake drum guided thereon between the confining flanges 13 and 14. These brake rings are shown as suspended by means of pivoted links 18 and 19 from a suitably supported rock shaft 20 which can be operated by means of a suitable handle lever 21. Turn buckle screws 22 may be interposed in these connections, for instance, between the suspension links and the brake ringsfor adjusting the relation of the brake rings to the brake drums.

TWith the construction described it will be apparent that when the brake lever is thrown to the right in Figure 1, the left hand brake ring 16 will be elevated so as to bring its lower peripheral portioncinto a substantially A f braking engagement with the lower peripha number of novel' eralportion of the brake drum 11 and that the right hand brake ring'l? will be lowered so asto bring the upper portion thereof A into braking engagement with the upperpe- In the drawingaccompanying and form-` riphera-l portion ofthe brake drum 12. The parts areV adjusted. so that the application ofthese reversely operatingbraking forces is Aeffected substantially simultaneously. This results in the application of a very powerful braking force'to the element being controlled.

To prevent undue `friction of the brake rings on the brake drums, l prefer to relieve them fora portion of their extent, as

indicated in Figures 2 and l3. vIn Figure 2 l the upwardly acting brake ring is shown as having van eccentrically relieved portion 23 at' the lower end thereofand in Figure 3 the downwardly braking ring vis indicated as" having an'eccentrically relieved portion 24E` atlthe upper end thereof. These relievedV portions, in fact, constitute the peripheral braking surfaces which normally stand free of the brake drums and are only brought into engagement with the brake drums through the operation. of lthe actuating mechanism.

The Yfriction of the ringsfon the drums is further reduced by making kthe rings of reduced width at` the upper and lower portions thereof, as indicated at25 and of Suthciently increased widthl at opposite central portions thereof, as indicated at 26 to form guides slidlngly engaging between the y flanges. These Wider portions arethe only parts which contact with the flanges and operate as guides tofloosely center the brake rings on the brake drums.

In Figures 4 and tvliave illustrated the adaptation of the inventonto the krear aXle ot a motor vehicle. In this case the brake rings are shown as supported by means of the sliats 27 jonrnaled `iny bearings .28 oni the axle -housing'QQ and having the eccentricV portions 30 journaled in the'suspensionv lugs 3i provided on the brake rings. These shafts :are shown asprovided with rocker arms 32l connected to operate in opposition by'means of a vswintging link 33. The lett llnFignre' have shown lliow the `brake rings may berelieved both'at the top and at` the bottom. asindicated'at 35 and 36.

This adapts" the` rings for interchangeable usepf y To preventl the rings romfswinging on their supports i have shown'theml as guided.

at their lower ends by 'means ofthe guide V pins 37 operatingin guide slots 38 provided f in the `lower ends ci thebrake rings.

brakeriiigs maybe adjustedV so thaty they will normally ridepractically free of eny l terrfedfto. lt desired, the rings maybe lined 1with .Babbitt nmetal to provide,y a smoothand silent gripping engagementland Illfhis invention makes itpossibleto form the braking element'spin onefpiece and in lthe iorm of "afsimple ring.V These brake rings have a relatively large braking area in "Contact with thebrake drnms and require no` special-friction lining such as is neces sary with they expanding aiidcontracting brake bands now Y"in" common use. The

gagement with the brake drums `and without constantly `dragging on "the drums as is usually tlieafcase. withV thel brake bandsV re-V freedom from chattering VWhatil claimis:` y y v u "lln a brake, thecombination with a brake druinyof a substantially rigidfbrake ring Vcompletely `surrounding said brake drum,V means for shifting said brake ring eccentrically of theudrum to bindthe `same on `the periphery yofthe drum and iian'gesY atjthecpposite edges of the brake drum for loosely "coniining the brake ring thereto, i

saidibrake ring having wider portions for giirdingcontact'with said ianges and' portions of lesser width'to be free of contact with such flanges;

2. Braking mechanism' comprising ar'pair of brake` drums7 brake rings encircling said brake drums andwmeans for substantially simultaneously. shitting. said` brake rings in opposite directions and eccentrically of the brake drums to thereby carry the same in reverse directions into brakingengagement zwithl the peripheral ortions of the drums.

3. Inbraking mec anism,a pair of brake drums, brake Aringsencircling said drums and means for looselysuspendmg said drum Vrings about thebr'ake drums andy for simul' taiieously shifting one brake ring upwardly and the other downwardlyinto braking engagement with therespectivedrums.

4. Braking mechanism comprising a brake drum7 a substantially rigid brake? ring supported in light guiding yengagement lwith the peripheral portion of the drum (and means for shifting said brake l.ring Aec'cenf trically Voi" the drum to thereby lcarry y,the

same into braking .engagement with Vlthe peripheralportion ofthe drinn, said brake ring being eccentrically relieved for .a Vportion of its periphery.

5. In brakemechanism la" brake drum, langes at the' lopposite edges4 of said. drum, a brake ring encircling" the 'drum andv lightly confined between Vthe anges and means for Abodily shifting saidfringfeccentrically of the drum tolthereby bring the vsame into holding engagement with the peripheral portion of the drum, said brake' ,ring having portions ofgreater width iorffguiding en-y gagement with the L'ilamges and portions of lesser width "treef of VContact withfsuch .i

iianges. y i Y f 6. Brakingmechanismjcomprising abrake drum, a brake ring surrounding the same,

means Vfor suspending-said brakefringabout the drum and substantially free of contact therewith, said suspension means being ad- ]ustable to regulate the relationof thebrakc ringto the drum rand being-operable to shift the ring eccentrically oil the drum.

7. The combination with a l-brake `drn1'n, of

a friction member for `cooperation' thereVV with, means for retaining themember .or Ithe drum comprising widened sections on the frictionV member end "flanges on the brake Y drum, and means connected to the saidmember intermediate ,lsaidfsections y:for moving it into braking action.` i y l,8. The combination withfa brake drum, ci

a friction member therefor, means for radif ally shifting the `meniber into Aand out ci contact with thefdrum7 means fon; the drum cooperating with Yspaced lpoints on the Vtriction member for holding `.it against lateral displacement, the said member :gradually decreasing in width from said y V point intermediate the same.

19. l'Ihecombination with a brake drum,

points to the l of a friction member therefor, means for radially shifting the member into and out of contact with the drum, means on the drum cooperating` With spaced points on the friction member for holding it against lateral displacement, the said member gradually decreasing in Width from said points to a point intermediate the same and lmeans connected to the friction member at its point of minimum width for moving it toward 10 and away from the drum.

In Witness whereof, I have hereunto set my hand this 2nd day of April, 1920.

ERNEST E. BOEN IN G. 

